For three years of the epidemic, the mask covered people's smile.French artist JR invited Hong Kong citizens to take off the mask and took a long -established smiley photo to form a community to create art exhibitions and spread joy to the society together.This exhibition will be exhibited in the area of Harbor City, Hong Kong on April 24th (Monday). In the five -color city, the giant black and white photos form a strong contrast with the surrounding environment, attracting the attention and attention of the public.(Reuters)